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Anettt [7]
3 years ago
11

If f(x)=3-2xand g(x)= 1/x+5, what is the value of f/g (8)?

Mathematics
1 answer:
Eva8 [605]3 years ago
3 0

Answer:

-\frac{104}{41}

Step-by-step explanation:

\frac{f(x)}{g(x)}=\frac{3-2x}{\frac{1}{x} +5}

To make this easier to deal with, we can plug in 8 first:

  • \frac{f(8)}{g(8)}=\frac{3-2(8)}{\frac{1}{(8)}+5 }
  • Then we can simplify the terms to get \frac{3-16}{\frac{1}{8} +5}=\frac{-13}{\frac{1}{8} +5}
  • The denominator of this fraction needs to have its own common denominator. To do so, we can multiply the 5 by \frac{8}{8} to give us: \frac{1}{8}+\frac{40}{8}
  • We can then simplify this to \frac{41}{8}
  • Now putting this back into our original fraction we have: \frac{-13}{\frac{41}{8} }
  • This is also equivalent to \frac{(\frac{-13}{1} )}{(\frac{41}{8} )} which means we need to take the whole denominator of the fraction and flip it and multiply it by the numerator to get: \frac{-13}{1}*\frac{8}{41}
  • This then simplifies to \frac{-104}{41}
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